Ultraviolet light, whether produced by the sun or an indoor tanning unit, consists of two main components – UVA and UVB, both of which contribute differently to your tan. Indoor tanning equipment utilizes a carefully formulated and controlled mixture of the wo light waves, designed to tan you with a  minimized risk of sunburn. Tanning outdoors does not give you this control, because the sun emits the entire spectrum of ultraviolet light, including the most intense rays that burn you more quickly. That’s why we call indoor tanning “Smart Tanning”